Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992eocm.rept..181k&link_type=abstract
In ESA, Environment Observation and Climate Modelling Through International Space Projects. Space Sciences with Particular Empha
Astronomy and Astrophysics
Astronomy
Data Retrieval, Data Storage, Data Systems, Rosat Mission, Spaceborne Astronomy, Data Bases, Optical Disks, Systems Engineering, Ultraviolet Radiation, X Ray Astronomy
Scientific paper
Rosat is an orbiting astronomical observatory sensitive in the 0.02 to 2.4 keV energy range (XUV and X-ray regime). The Rosat archive keeps the raw and auxiliary data and data products from the Standard Analysis Software System (SASS) as well as other evaluation products. The Rosat archival and retrieval system consists of a set of subsystems and utilities. The two main features are the archival subsystem and the retrieval subsystem. The principle of archiving is the storage of data trees rather than files, that is hierarchical structures of directories, subdirectories, and files. Optical disks are the prime storage media. The access criteria are the grouping of data called project and a keyword, which describes the type of data. One objective of an archival system is the easy retrieval. This is achived by sorting the file sets in different archive volumes. The whereabouts, size etc. of the data are kept in the archive catalog of the relational database INGRES. On retrieval these saved sets are unpacked and copied back to a user disk or the so called archive pool, a set of disks with 'Read' access for the user.
Bohnet Achim
Koehler Helmut
Paul Joachim
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